Aptitude - Arithmetical Ability

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37.

Find the average of first 20 multiples of 7.?                          
A. 73.5 B. 74.5
C. 75.5 D. None



38.

The average weight of 10 oarsmen in a boat is increased by 1.8 kg when one of the crew, who weighs 53kg is replaced by a new man. find the weight of the new man.?                          
A. 62kg B. 71kg
C. 72kg D. 75kg



39.

A batsman makes a score of 87 runs in the 17th inning and thus increases his average by 3. find his average after 17th inning.?                          
A. 39 B. 40
C. 42 D. 43




40.

The average runs of a cricket player of 10 innings was 32. How many runs must he makes ih his next innings so as to increase his average of runs by 4??                          
A. 2 B. 4
C. 70 D. 76



41.

The mean of 50 observations was 36. It was found later that an observation 48 was wrongly taken as 23. The corrected new mean is?                          
A. 35.2 B. 36.1
C. 36.5 D. 39.1



42.

How many candidates were interviewed everyday by the panel A out of the three panels A, B and C?(I). The three panels on average interview 15 candidates every day.(II). Out of a total of 45 candidates interviewed everyday by the three panels, the number of candidates interviewed by panel A is more by 2 than the candidates interviewed by panel c and is more by 1 than the candidates interviewed by panel B.?                          
A. I alone sufficient while II alone not sufficient to answer B. II alone sufficient while I alone not sufficient to answer
C. Either I or II alone sufficient to answer D. Both I and II are not sufficient to answer



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